The coefficient of restitution (COR) is a measure of the restitution of a collision between two objects: how much of the kinetic energy remains for the objects to rebound from one another vs. how much is lost as heat, or work done deforming the objects. The mathematics were developed by Sir Isaac Newton in 1687.
Definition of squall. 1  intransitive verb. : 2  to cry out raucously : scream. 3  transitive verb. :  to utter in a strident voice.
A squall line is an organized line of thunderstorms. It is classified as a multi-cell cluster, meaning a thunderstorm complex comprising many individual updrafts. They are also called multi-cell lines.